When running under Kubernetes, the probe will try to talk to kubelet on 10255, unsecured, if it doesn't know the node name. We should not assume unsecured access.

There is a secured port at 10250; probably we have access to credentials. Or we could just remove that code and insist on knowing the node name.

Kubeadm removes the unsecured port by default: kubernetes/kubernetes#64187

This is possibly the underlying issue for #3104 (OpenShift)